Nokia BH-905 - Manual (Page 5)

I n t r o d u c t i o n
5
The headset is compliant with the Bluetooth Specification 2.1 + EDR
supporting the following profiles: Headset Profile 1.1, Hands-Free
Profile (HFP) 1.5, Advanced Audio Distribution Profile (A2DP) 1.2, and
Audio Video Remote Control Profile 1.0. Check with the manufacturers
of other devices to determine their compatibility with this device.
■ About active noise cancellation
Wolfson AudioPlus TM Ambient Noise Cancellation technology uses
patented signal processing technology and advanced acoustic design
expertise to deliver class-leading active noise cancellation for stereo
headsets and headphones.
This novel feed-forward technology cancels more decibels of noise
across a wider frequency range than traditional feedback technologies,
providing a peaceful and tranquil environment for users wherever they
happen to be. As Wolfson's advanced technology does not process the
playback audio stream, your music comes through in untouched hi-fi
quality stereo.